My tank has been set up (and cycled!) for about 3 months now. It is a 7 gallon tank, with a filter, as well as live plants, and holds 4 African Dwarf Frogs.

My nitrate, nitrite, and ammonia levels were at 0 - .25 ppm for the past 2 months, but within the last 5 days I've seen some very odd spikes. One morning I checked the levels and both my nitrate and nitrite levels were incredibly unsafe (nitrate - 160 ppm / nitrite - 10 ppm). I immediately added the recommended dose of Nitraban to my tank and performed a 15-20% water change with de-chlorinated water (48 hours of sitting out plus ammo-lock). Within a few hours the nitrate and nitrite levels seemed safe, but I began de-chlorinating another bucket of water intending to do water changes every day to every other day until I was sure that my tank was safe for my frogs.

The next morning I noticed all of my frogs gasping for air from the top of the tank. I immediately tested nitrate, nitrite, ammonia, pH, GH, and KH. My nitrate and nitrite had dropped back to nearly 0 ppm, while my ammonia levels had spiked up to nearly 8 ppm!! Also the normal GH and KH of my tank water are both about 150 ppm, and the KH had dropped to 40 ppm. My pH also dropped from about 7.2 to 6.2, which I assume has something to do with the ammonia present. I tested my "water change" water to see if it was ready for a change, it was, and I performed an emergency water change of about 40% as well as adding a recommended dose of ammo-lock to the tank. The next day my levels of nitrate, nitrite, as well as ammonia read nearly 0 ppm. The KH and pH however remained extremely low, and I can still see my frogs gasping for air and swimming near the top of the tank. I have been performing water changes EVERY day since then of about 20%, and still no change in their behavior. I really want to save my little frogs, anyone have any ideas as to what may be causing their behavior to seem so stressful??